I have looked through the older version of the theme.liquid file and this code has been there ever since the very 1st version of the code
Hrrrm keep in mind file versions don’t propagate when you duplicate a theme so if you have unpublished version you’d have to dig.
There’s also the option of getting a copy of the latest version of the theme and checking if its’ there.
Overall seems a little suspicious to me since a basic search turns up zero indications of what app is using that domain.
If it’s not a sloppy app uninstall it could also be tracking code someone added to have I.P address data on your customers.
I’d definately contact the theme developers for clarification if this is supposed to be in there and if they say no remove it permanently eventually.
No need to reply.